OFFSET
1,1
COMMENTS
Column 1 of A208492.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 11*a(n-1) - 14*a(n-2).
Empirical g.f.: 8*x*(19 - 28*x) / (1 - 11*x + 14*x^2). - Colin Barker, Jul 03 2018
EXAMPLE
Some solutions for n=4:
..3..2....2..3....1..1....3..1....1..0....1..1....2..1....2..0....1..0....1..3
..3..2....0..1....2..2....3..1....2..1....3..1....1..0....3..1....0..0....2..0
..1..3....2..0....1..1....3..3....1..2....0..2....3..1....2..0....0..3....0..2
..0..1....0..1....0..0....3..1....1..1....1..0....0..2....3..1....1..0....2..1
..0..0....3..0....0..0....1..1....0..0....2..1....0..0....1..2....1..0....1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 27 2012
STATUS
approved